Additional Proxy Soliciting Materials (SEC Filing - DEFA14A)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐		Preliminary Proxy Statement
☐		Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐		Definitive Proxy Statement
☒		Definitive Additional Materials
☐		Soliciting Material Pursuant to §240.14a-12

SIERRA ONCOLOGY, INC.

(Name of Registrant as Specified In Its Charter)

N/A

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒		No fee required.
☐		Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
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Your Vote Counts!
SIERRA ONCOLOGY, INC.
2021 Annual Meeting
Vote by June 7, 2021
11:59 PM ET
SIERRA ONCOLOGY, INC.
1820 GATEWAY DRIVE, SUITE 110
SAN MATEO, CA 94404
D35899-P50937
You invested in SIERRA ONCOLOGY, INC. and it's time to vote!
You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the stockholder meeting to be held on June 8, 2021.
Get informed before you vote
View the Notice and Proxy Statement and Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 25, 2021. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to [email protected]. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.
For complete information and to vote, visit www.ProxyVote.com
Control #
Smartphone users
Point your camera here and
vote without entering a
control number
Vote Virtually at the Meeting*
June 8, 2021
10:00 AM PT
Virtually at: www.virtualshareholdermeeting.com/SRRA2021
*Please check the meeting materials for any special requirements for meeting attendance.V1

Vote at www.ProxyVote.com
THIS IS NOT A VOTABLE BALLOT
This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters.
Board Recommends
Voting Items
1. Election of Class III Directors
Nominees:
01) Stephen G. Dilly, M.B.B.S., Ph.D. For
02) Robert Pelzer
03) Josh Richardson, M.D.
2. To ratify the appointment of Deloitte & Touche LLP as the independent registered public accounting firm for the fiscal
year ending December 31, 2021. For
3. To approve the advisory resolution on the compensation of our named executive officers. For
4. To determine the frequency of future advisory votes on the compensation of our named executive officers. 1 Every
Year
NOTE: In their discretion, the proxies are authorized to vote upon such other business as may properly come before the
annual meeting.
Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click 'Sign up for E-delivery'.
D35900-P50937

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